This is the 4841st most frequent Russian word.
инвалида
The Russian word "инвалида" translates to "a person with a disability" in English.
In this sentence, 'инвалида' is used in the accusative case as the direct object to denote a person with disabilities receiving help.
Он помог инвалиду подняться по лестнице.
He helped the disabled person to climb the stairs.
Here, 'инвалидов' is in the genitive plural case, referring to disabled people collectively who would benefit from the paths.
В парке построили удобные дорожки для инвалидов.
Convenient paths for disabled persons were built in the park.
'Инвалидам' is used in the dative plural case to denote the recipients of assistance provided by the foundation.